diff --git a/perfect6502.c b/perfect6502.c
index 45f6a23..1ca88e0 100644
--- a/perfect6502.c
+++ b/perfect6502.c
@@ -819,22 +819,4 @@ void handle_monitor();
 #elif defined(COMPARE)
 #include "compare.c"
 #else
-int
-main()
-{
-	initAndResetChip();
-
-	/* set up memory for user program */
-	init_monitor();
-
-	/* emulate the 6502! */
-	for (;;) {
-		step();
-		if (isNodeHigh(clk0))
-			handle_monitor();
-
-		chipStatus();
-		//if (!(cycle % 1000)) printf("%d\n", cycle);
-	};
-}
 #endif
diff --git a/perfect6502.h b/perfect6502.h
new file mode 100644
index 0000000..bf42136
--- /dev/null
+++ b/perfect6502.h
@@ -0,0 +1,3 @@
+extern void initAndResetChip();
+extern void step();
+extern void chipStatus();
diff --git a/runtime_init.c b/runtime_init.c
index c071d1d..f4fa6fd 100644
--- a/runtime_init.c
+++ b/runtime_init.c
@@ -1,5 +1,7 @@
 #include <stdio.h>
 
+#include "perfect6502.h"
+
 extern unsigned char memory[65536]; /* XXX must be hooked up with RAM[] in runtime.c */
 
 extern unsigned short readPC();
@@ -102,3 +104,24 @@ handle_monitor()
 	}
 }
 
+int
+main()
+{
+	int clk = 0;
+
+	initAndResetChip();
+
+	/* set up memory for user program */
+	init_monitor();
+
+	/* emulate the 6502! */
+	for (;;) {
+		step();
+		clk = !clk;
+		if (clk)
+			handle_monitor();
+
+		//chipStatus();
+		//if (!(cycle % 1000)) printf("%d\n", cycle);
+	};
+}